A)increasing its membrane's permeability to Na⁺.
B)decreasing its membrane's permeability to H⁺.
C)decreasing its membrane's permeability to Cl⁻.
D)increasing its membrane's permeability to Ca⁺⁺.
E)increasing its membrane's permeability to K⁺.

A)must include chemical senses, mechanoreception, and vision.
B)includes a minimum of 12 effector neurons.
C)has information flow in only one direction: toward an integrating centre.
D)has information flow in only one direction: away from an integrating centre.
E)includes sensory information, an integrating centre, and effectors.

A)stimuli → sensory neuron → sensory nerve → CNS → PNS
B)stimuli → sensory nerve → sensory neuron → PNS → CNS
C)stimuli → sensory neuron → sensory nerve → PNS → CNS
D)stimuli → sensory nerve → sensory neuron → CNS → PNS
E)sensory nerve → stimuli → sensory neuron → PNS → CNS